Overhung centrifugal pump and gland



April 2, 1929. A. HOLLANDER OVERHUNG CENTRIFUGAL PUMP AND GLAND Filed March 26, 1927 IN V EN T 0R.

" ATTO EY,

Patented Apr. 2, 1229. I

at r

arenas HOLLANDEB, or BERKELEY, CALIFORNIA, ASSIGNOR, BY MEsNE assreninnnrs, Po BYRON .mcxson PUMP 00., A CORPORATION or DELAWARE.

ovEnPiUNe'o n'rRIEueA-L PUMP AND GLAND. I

Application filed. March 26, 1927. 'Seri al No. 178,723.

My invention has for its obj ectcentrifugal pump mechanism or the like mounted upon the overhanging or shaft extended end of motor means and has special reference to the packing gland, the method of packing and lubricating and thefixing of the impeller and associated parts, whereby the parts may be most readily machined, assembled, maintained in operation and dis-assembled for repairs, replacements or adjustments, all in the simplest cheapest and most efficient manner.

The apparatus 'ofmy construction requires less space in any given case and a less number and size/of parts and enables the operator to repack or repair-thegland mechanism with the greatest ease and at all times to maintain perfect lubrication thereof.

By referring to the accompanying drawing my invention will be made clear.

1 Fig. 1 is a perspective view of a motor and pump involvingmy invention.

Fig. 2 is across section through the centrif ugal pump and gland mechanism mounted on the end of the motor shaft, a fragmentary portion of the motor only being shown.

Similar numerals refer to identical parts.

A. conventional motor is shown by the numeral 1, provided with a shaft extension 2, and motor bearing 3.

Secured to the motor is the pump casing 4 having a flange connecting to the motor shown at 5, and having formed in its lower portion a drain compartment 6 adapted to be drained at 7.

Within the casing extension and preferably cast solid therewith is the gland sleeve 8 having the end member 9 adjacent to, and spaced a short distance from the bearing 3. Through the sleeve is introduced the lubrieating connection 10 which may be fed from any conventional source as a pressure grease cup or oil reservoir 11. Cup leathers are shown at 12, 13 respectivelyadapted to retain the lubricant against the shaft and expanding under any lubricating pressure and/or suction so that they are always in running contact with the shaft while preventing leakage thereby.

At 14, 15 is shown packing material and at 16 a spacing cage holding the packing 14, 15 apart to insure the introduction ofa volume of lubricant therebetween at'all times from the reservoir 11. 1

The cup leather 12 is retained by the memthe motor 1, through the extended shaft 2.

Conventional keeper rings are shown at 38-39 respectively.

The casing a is provided with the cover 23 forming also a side of the casing opposite the impeller 20 and being assembled therewith at the joint 24:, and secured by the bolts as 25.

In the casing 4 is provided the suction inlet 26- and discharge outlet 27 whereby fluid is taken up through the rotation of the impeller '20 from the suction 26, entering the suction side of the impeller as shown by the arrow 28 and being discharged through the outlet 27 in the direction of the arrow 29.

Particular attention is directed to the impellerhub at 31) which engages by ashoulder or socket connection with the shaft end, and may with advantage have the key 21 interposed between the hub and shaft, although in small units this key is not always necessary.

It will now be seen that there is a fixed dis-, tan'ce between the members 9 and 17 and that the cup leathers 12 and ,13 are held thereagainst by the lubricant from the pipe 10 and packing 141, 15 respectively and that the said cup leathers are likewise forced against the shaft so that the lubricant is retained Within the gland means, and that a negative pressure or suction adjacent the hub of the impeller further contributes to maintain the cup leather 13 sealed against the shaft.

It will also be noticed that by removing the cover 23 and then the holding screw 22 that the impeller 20 may be removed after which the screws 18, 19 upon being released enable the end member 17 to be taken out, thus exposing the interior of the gland, the leathers 12 and 13 and packings 14, 15 for any pur-v the pump end.

In this way the space between the gland end or member 9 and the motor bearing 3, as

shown at 40, may be maintained at a mini-- mum, all of the parts thus occupying a minimum of space and being. of a mmlmum size,

and therefore Weight and cost, and making an I assembled unit of unusual efliciency and cheapness of construction and operation.

I claim 1. In combination With a centrifugal pump having a casing and a shaft, a housing for sealing said shaft Where it enters said casing, packing means, a cover surrounding said shaft and adapted to close the packing means Within said housing, and means fixing said cover to said housing, an end plate closing an o enin in said casin throiwh which said ,cover may be reached,impeller means mounted on said shaft between said cover and said plate.

2. In combination with a centrifugal pump havinga casing and a shaft, a housing for sealing said shaft where it enters said casing, packing means, a cover surrounding said shaft and adapted to close the packing means Within said housing, and means fixing said cover to said housing, an end plate closing an opening in said casing through which said cover may be reached, impeller means mounted on said shaft between said cover and said plate and means holding said impeller in fixed relation on said shaft and accessible upon the removal of said plate to permit the dismounting of said impeller.

ALADAR HOLLANDER. 

